JP6034124B2 - Road lighting equipment - Google Patents

Description

  The present invention relates to a road lighting device that is installed on a column or the like on the side of a road to illuminate a road below.

  A road illuminating device that is installed on an upper portion of a support column standing on the side of a road and illuminates a lower road is usually installed at intervals of several tens of meters as shown in FIG. Therefore, it is required to illuminate the road 2 over a wide range in the longitudinal direction L. In recent years, LEDs (light emitting diodes) have been adopted as light sources due to demands for energy saving and the like. Thus, for example, Patent Documents 1 and 2 below disclose specially shaped lenses and road lighting fixtures that can efficiently illuminate the longitudinal direction of a road using LEDs as light sources.

JP 2010-177028 A Special table 2010-524170 gazette

  In Patent Documents 1 and 2, light distribution is controlled by a lens attached to a light source. However, in the road lighting device, as shown in the partial cross-sectional view of FIG. 7, the light source 101 is accommodated in the main body 103 having the light irradiation port 102 opened in order to protect it from wind and rain. Is covered with a light transmitting plate 103 that transmits light made of glass, resin, or the like. Since the translucent plate 103 reflects part of the light emitted from the light source 101 and returns it to the interior of the fixture, the illumination efficiency of the road is reduced. Also, in order to transmit light emitted obliquely downward from the light source, it is necessary to provide an irradiation port that is one or more times larger than the range in which the light sources are arranged. The part looks dark and looks bad.

  Moreover, the light emitted from the light source at an angle close to the horizon hits the side surface of the appliance main body instead of the translucent plate, which causes a reduction in road illumination efficiency.

  The present invention is intended to solve the above-described problem, and an object of the present invention is to provide a road lighting device that can use light reflected in an appliance by a translucent plate that covers an irradiation port for road lighting. It is said. A second object is to make the peripheral portion of the light source appear bright from the ground.

  The gist of the present invention for achieving the object lies in the inventions of the following items.

[1] A road illumination device that illuminates a road from below to above,
A light-emitting unit group in which a plurality of light-emitting units each having a light-emitting element and a lens that controls light distribution are arranged and arranged in the body;
A reflector provided adjacent to the outside of the light emitting unit group and inclined obliquely outward;
And apertured irradiation port at a portion corresponding to the body, before Symbol onset optical unit group and the reflecting plate,
A translucent plate covering the irradiation port;
Have
The light emitting unit group includes a first light emitting unit adjacent to the reflecting plate, and a second light emitting unit farther from the reflecting plate than the first light emitting unit,
The said reflecting plate reflects the light which inject | emitted from the said 2nd light emission part, and was reflected by the said light transmission board, and the light which injects directly from the said 1st light emission part . The road illuminating device characterized by the above-mentioned .

  In the above invention, the light distribution is controlled by using the lens and the reflector together. In particular, the reflector changes the light path so that the light reflected by the translucent plate covering the irradiation opening is re-reflected and emitted from the irradiation opening. Further, since the reflector is disposed adjacent to the light emitting part at the end, it is possible to prevent the periphery of the light emitting part from appearing dark when looking up from the road, and the appearance is improved.

[2] The reflector includes a first inclined portion that is inclined obliquely outward, and a second inclined portion that is closer to the distal end than the first inclined portion and is inclined further outward than the first inclined portion. [1] The road lighting device according to [1].

  In the above invention, since the light is inclined further outward than the first inclined portion, the path of light that is emitted obliquely from the light emitting portion and can be directly output from the irradiation port, even if the reflector is adjacent to the light emitting portion at the end. The reflector is difficult to block.

[3] The light-emitting unit includes a light source composed of a light-emitting diode and a lens having a concave portion in which the light source is accommodated and attached to the light source with the concave portion covered. [1] or [2] A road lighting device according to claim 1.

  According to the road lighting device according to the present invention, the light reflected by the translucent plate covering the irradiation port can be effectively used for road lighting. Moreover, since the surrounding part of the light source can be seen brightly from the ground, the appearance is improved.

It is a figure which shows the example of installation of the road illuminating device which concerns on embodiment of this invention. It is a figure which shows the front of the road illuminating device which concerns on embodiment of this invention, a lower surface, an upper surface, a back surface, and a side surface. It is a perspective view which shows a mode that the road illuminating device of the state which removed the translucent board was seen from diagonally downward. It is sectional drawing which shows the AA cross section of a road illuminating device. It is explanatory drawing which shows the cross section of the lens in the width direction and longitudinal direction of a road, and the course of light. It is a figure which compares and shows the light distribution in the case of having a reflective mirror, and the light distribution in the case of not having a reflective mirror. It is explanatory drawing which shows the optical path in the road illuminating device without a reflective mirror.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows an installation example of a road lighting device 10 according to an embodiment of the present invention. The road lighting device 10 is mounted substantially horizontally on the upper part of the support column 3 that is erected on the side of the road 2 to illuminate the road and its surroundings from above. The road lighting device 10 is installed along the longitudinal direction L of the road 2 at intervals of several tens of meters (for example, 40 m). The road illumination device 10 illuminates the road 2 over the entire width direction W and illuminates the road 2 in the longitudinal direction L over a wide range.

  FIG. 2 shows the front, bottom, top, back, and side surfaces of the road lighting device 10. The road lighting device 10 drives a housing 11 having a light irradiation port on the lower surface side, a plurality of light emitting units 32 (see FIG. 3) housed in the housing 11, a reflecting plate 36, and the light emitting unit 32. And a control circuit (not shown). The main part of the housing 11 is a cast product manufactured by pouring molten metal into a mold, cooling and solidifying it.

  A casing 11 of the road lighting device 10 includes a base 12 that houses a metal fitting for fixing the road lighting device 10 to the support column 3 and a power terminal block of the light emitting unit 32, and a horizontally long shape that extends forward from the base 12. And a main body 14 having a relatively thin hollow box shape.

  A substantially rectangular irradiation port 16 is opened on the lower surface of the main body 14. The irradiation port 16 is covered with a translucent plate 18 that transmits light. Specifically, a light transmitting plate 18 is fitted into the irradiation port 16 with a packing interposed therebetween. The translucent plate 18 is a plate-like member that transmits light, and is made of glass, resin, or the like.

  FIG. 3 shows the road illumination device 10 with the translucent plate 18 removed as viewed from the front and obliquely below. FIG. 4 shows an AA cross section of the road lighting device 10 in FIG. In the main body 14, a plurality of light emitting units 32 each having a lens 42 that controls light distribution are arranged so as to face the irradiation port 16 from the inside of the main body 14. A reflector 36 that is inclined obliquely outward is provided adjacent to the outer side of the light emitting part 32 at the end in the group of light emitting parts 32 arranged. The irradiation port 16 is opened at a portion corresponding to the light emitting unit 32 and the reflecting plate 36, and all the light emitting units 32 and the reflecting plate 36 are included inside the irradiation port 16.

  Here, the light emitting units 32 are arranged in a matrix of 14 in the longitudinal direction L of the road 2 and 6 in the width direction W of the road 2. The reflecting plate 36 is provided along the width direction W of the road 2 adjacent to the outside of the light emitting sections 32 at both ends in the longitudinal direction L of the road 2 among the group of light emitting sections 32 arranged in a matrix.

  As shown in FIG. 4, the reflecting plate 36 includes a first inclined portion 36 a inclined obliquely outward, and a second inclination inclined more outward than the first inclined portion 36 a on the tip side of the first inclined portion 36 a. A portion 36b is provided. The reflecting plate 36 is configured by bending a metal plate having high reflectivity such as aluminum or stainless steel.

  Each light emitting section 32 is configured by covering a lens 42 on an LED 34 (light emitting diode).

  5A shows a cross section of the lens 42 in the transverse direction (width direction W) of the road 2, and FIG. 5B shows a cross section of the lens 42 in the longitudinal direction (longitudinal direction L) of the road 2. .

  The lens 42 is flattened by dividing the sphere into two by a plane passing through the center thereof, and has a shape with a recess 43 on the cut surface. The lens 42 is attached so that the concave portion 43 covers the LED 34.

  As shown in FIG. 2B, the lens 42 controls the path of the light emitted from the LED 34 so that the light distribution is symmetric about the lens 42 in the longitudinal direction (L direction) of the road 2. . On the other hand, as shown in FIG. 5A, the lens 42 controls the path of light in the width direction (W direction) of the road 2 so that the light distribution is asymmetric about the lens 42. Specifically, in the control in the width direction of the road 2, the light traveling toward the opposite shore side (forward) of the road 2 is increased, and the light traveling toward the opposite side (backward) of the road 2 with respect to the installation position of the road lighting device 10 is reduced. Control to do.

  The lens 42 mainly controls the light distribution in the width direction W of the road 2 by the shape of the incident surface 44 (the inner surface of the concave portion 43 of the lens 42) on which the light emitted from the LED 34 is incident, and is mainly controlled by the shape of the exit surface 45. The light distribution in the longitudinal direction L of the road 2 is controlled.

  That is, the emission surface 45 has a symmetrical shape with respect to the center of the lens 42 in the longitudinal direction L of the road. Generally, it is a shape of a curved surface portion of a semi-ellipsoid obtained by rotating an ellipse by 180 degrees about its major axis and divided into two by a plane passing through the major axis, and is symmetrical with respect to the center of the lens. Is made. The LED 34 is located at the center position of the lens 42 in the longitudinal direction L of the road 2.

  On the entrance surface 44, the cross section of the road 2 in the longitudinal direction L (see FIG. 5B) has a substantially semicircular or semielliptical shape. The cross section of the road 2 in the width direction W (see FIG. 5A) is obtained so that the above-mentioned light distribution (light distribution with increased light to the front (opposite side) and less light to the rear) can be obtained. It is asymmetric with respect to the center of the lens and has a shape combining a convex surface and a concave surface. Further, the LED 34 is at a position shifted rearward from the center of the lens 42 in the width direction W of the road 2.

  In the cross section in the width direction W of the road 2, the incident surface 44 has a concave first concave surface portion 44 a as viewed from the LED 34, a convex convex surface portion 44 b as viewed from the LED 34, and the LED 34 from the rear side to the front side. The concave second concave surface portion 44c is smoothly connected.

  Next, the function of the reflecting plate 36 will be described with reference to FIG.

  A part of the light emitted from each light emitting unit 32 is reflected by the translucent plate 18. The reflection plate 36 further reflects the light reflected by the translucent plate 18 and changes the path of the light to the lower side of the road 2 or the like.

  Further, the second inclined portion 36b is inclined further outward than the first inclined portion 36a so that the light emitted from the light emitting portion 32 illuminates the road 2 widely in the longitudinal direction L. That is, as compared with the case where the reflecting plate 36 is entirely configured by the inclination of the first inclined portion 36a, the path of light traveling obliquely outward from the road illumination device 10 (light traveling further in the longitudinal direction L of the road 2) is obstructed. It becomes difficult to do.

  In order to emit light emitted obliquely from the light emitting unit 32 directly from the irradiation port 16, it is necessary to provide the irradiation port 16 that is one or more times larger than the range in which the light emitting unit 32 group is arranged. For this reason, when the reflecting plate 36 is not provided, when the irradiation port 16 of the road lighting device 10 is viewed from the ground, the periphery of the light emitting unit 32 group arranged in a matrix looks dark. On the other hand, when the reflecting plate 36 is provided adjacent to the light emitting portion 32 at the end of the light emitting portion 32 group, the periphery of the light emitting portion 32 group is also brightened by the light from the reflecting plate 36, and the translucent plate in the irradiation port 16. 18 shines more extensively and the appearance improves.

  That is, by making the reflecting plate 36 adjacent to the end of the light emitting unit 32 group, it is possible to prevent a dark part from being generated around the light emitting unit 32 group. Even if the reflector 36 is provided close to the end of the light emitting unit 32 group, since the inclination is made in two stages as in the first inclined part 36a and the second inclined part 36b, the “light kicking by the reflector 36 is performed. As described above, the road 2 can be illuminated over a wide area in the longitudinal direction L.

  Moreover, since the light reflected by the translucent plate 18 is reflected by the reflecting plate 36 and can be used for lighting the road 2, the light can be effectively used to illuminate the road 2. Further, the reflection plate 36 also functions to cover the wiring to the light emitting unit 32 and various peripheral components.

  FIG. 6 shows a cross section of the light distribution downward from the road illumination device 10 in the longitudinal direction L of the road 2. FIG. 4A shows the case where the reflection plate 36 is provided, and FIG. 4B shows the case where the reflection plate 36 is not provided. It can be seen that the brightness for illuminating the road 2 is increased when the reflection plate 36 is provided, compared to the case where the reflection plate 36 is not provided.

  The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to that shown in the embodiment, and there are changes and additions within the scope of the present invention. Are also included in the present invention.

  In the embodiment, the reflection plate 36 is provided only in a part of the periphery of the light emitting unit 32 group. However, the reflection plate 36 may be provided in the entire periphery.

  Further, the inclination of the reflecting plate 36 does not necessarily have to be two steps, and may be a one-step inclined reflecting plate as long as “light kick” is not a problem.

  The shape of the lens 42 shown in the embodiment is merely an example, and the present invention is not limited to this.

  The road lighting device 10 is not limited to the one installed as shown in FIG. For example, you may attach to the front-end | tip of an arm etc. which extended a little inside the road 2 from the support | pillar 3 installed beside the road 2. Moreover, it may attach to the support | pillar standing at the four corners of an intersection, etc., and may illuminate the inside of an intersection.

  Further, in the embodiment, the road lighting device 10 is installed horizontally, but it may be installed to be inclined to some extent (for example, 5 degrees) toward the opposite bank side of the road 2.

  The shape of the housing 11 and the like of the road lighting device 10 shown in the embodiment is an example, and is not limited to this.

DESCRIPTION OF SYMBOLS 2 ... Road 3 ... Support | pillar 10 ... Road illuminating device 11 ... Housing 12 ... Base 14 ... Main body 16 ... Irradiation port 18 ... Translucent plate 32 ... Light emission part 34 ... LED
36 ... Reflecting plate 36a ... 1st inclined part 36b ... 2nd inclined part 42 ... Lens 43 ... Recessed part 44 ... Incident surface 44a ... 1st recessed surface part 44b ... Convex surface part 44c ... 2nd recessed surface part 45 ... Outgoing surface

Claims (3)

A road lighting device that illuminates a road from above to below,
A light-emitting unit group in which a plurality of light-emitting units each having a light-emitting element and a lens that controls light distribution are arranged and arranged in the body;
A reflector provided adjacent to the outside of the light emitting unit group and inclined obliquely outward;
And apertured irradiation port at a portion corresponding to the body, before Symbol onset optical unit group and the reflecting plate,
A translucent plate covering the irradiation port;
Have
The light emitting unit group includes a first light emitting unit adjacent to the reflecting plate, and a second light emitting unit farther from the reflecting plate than the first light emitting unit,
The said reflecting plate reflects the light which inject | emitted from the said 2nd light emission part, and was reflected by the said light transmission board, and the light which injects directly from the said 1st light emission part . The road illuminating device characterized by the above-mentioned . The reflection plate includes a first inclined portion that is inclined obliquely outward, and a second inclined portion that is located on the distal end side of the first inclined portion and is inclined further outward than the first inclined portion. The road lighting device according to claim 1. 3. The road illumination according to claim 1, wherein the light-emitting unit includes a light source including a light-emitting diode and a lens that has a concave portion that accommodates the light source and is attached to the light source with the concave portion covered. apparatus.

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